NEW
Font size
S
M
L
XL
WorksheetsDihybrid Practice
Total questions: 15
Worksheet time: 17mins
Name
Class
Date
1.
In a dihybrid cross
a)
one trait is crossed.
b)
two traits are crossed.
c)
four boxes are needed for the punnett square.
d)
mom's alleles are dominant.
2.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
3.
Which of the following is the best example for a heterozygous genotype?
a)
AA
b)
Ab
c)
Bb
d)
bb
4.
In flowers, purple color is dominant to pink and short is dominant to tall. Cross a flower that is heterozygous for both traits with another flower that is pink and tall. What is the percentage of the flowers being pink and short?
a)
75%
b)
25%
c)
4
d)
1/2
5.
parent 1: GgBB
parent 2: ggBb
Find the gametes for parent 1.
parent 2: ggBb
Find the gametes for parent 1.
a)
GB, GB, gB, gB
b)
gB, gb, gB, gb
c)
Gg, BB, GB, GB
d)
gg, Bb, gB, gb
6.
R= red
r= green
Which color is recessive?
r= green
Which color is recessive?
a)
red
b)
green
c)
both
d)
brown
7.
Which of the following identifies the gametes?
a)
A
b)
B
c)
C
d)
D
8.
Which of the following identifies the phenotypes?
a)
A
b)
B
c)
C
d)
D
9.
Which trait is always expressed when present?
a)
recessive
b)
dominant
c)
phenotype
d)
allele
10.
How many alleles do we get from each parent for each trait?
a)
one
b)
two
c)
three
d)
four
11.
In flowers, purple color is dominant to pink and short is dominant to tall. Cross a flower that is heterozygous for both traits with another flower that is pink and tall. What is the percentage of the flowers being pink and short?
a)
75%
b)
25%
c)
4
d)
1/2
12.
What goes in box 1
a)
AABb
b)
AABB
c)
aabb
d)
AaBb
13.
What goes in box 2
a)
AABb
b)
AaBb
c)
aabb
d)
AaBB
14.
Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
a)
0%
b)
25%
c)
50%
d)
100%
15.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
Reset
